16 lines
385 B
Text
16 lines
385 B
Text
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shader_type canvas_item;
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uniform float size = 512.0;
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uniform sampler2D input_texture;
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vec3 nm2flow(vec2 x) {
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x -= vec2(0.5);
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vec3 rv = vec3(sign(x.x)*vec2(-x.y, x.x), -1.0);
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return normalize(rv);
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}
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void fragment() {
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vec4 texture_sample = textureLod(input_texture, UV, 0.0);
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vec3 flowmap = nm2flow(texture_sample.xy) * 0.5 + 0.5;
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COLOR = vec4(flowmap, 1.0);
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}
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